Recuperator-furnace.



W. H. STUBBLEBINE.

RECUPERATOR FURNACE.

. APPLICATION FILED OCT. 19. I917: 1,279,932. Patentedfiept. 24,1918.

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RECUPERATDR FURNACE.

APPHCATIGN FILED 001.19 1917.

iatented fiept. 2 1-, 1918 4 $HEETSSHEET 2.

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RECUPERATOH FURNACE.

APPUCATION FILED 00119. I917.

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APPLICATION FILED OCT. 19. 1911.

Patented Sept. 24,1918,

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UNITED STATES PATE T FQE.

WILLIAM H. STUBBLEBINE, ALLENTOWN, PENNSYLVANIA.

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Specification of Letters Patent.

Patented Sept. 24:, 1918.

Application filed October 19, 1917. Serial No. 197,473.

7 marked thereon, whichform a part of this specification. V

This invention relates to new and useful improvements in recuperator furnace, and consists of a simple and eflicient apparatus of this nature which may be installed upon various types of metallurgical furnaces, having various details of construction, combinations and arrangements of parts which will be hereinafter fully described, shown in the accompanying drawings and then specifically defined in the appended claim.

I illustrate my invention in the accompanying drawings, which with the letters of reference marked thereon, form a part of this specification and in which:

Figure 1 is a central vertical sectional view through the recuperator.

Fig. 2 is a longitudinal sectional view taken on line 22 of Fig. 1.

Fig. 3 is a sectional view through the recuperator taken on line 33 of Fig. 1.

Fig. 4 is a vertical sectional View on line l-4 of Fig. 1, and

Fig. 5 is a sectional view on line 5-5 of Fig. 1, a portion of the recuperator being shown in elevation.

Reference now being had to the details of the drawings by numerals:

1 designates the fire box of the recuperator in which the grate 2 is mounted, and 3 designates the working chamber in which the charge of iron or steel to be melted or preheated is placed and in which chamber it is necessary to maintain an intense heat. The furnace is provided with a fuel opening 4 in which coal may be introduced, and openings 5 are formed in the front wall of the furnace, through which pipes 6 pass and affording means through which pulverized fuel may be fed into the furnace when de-- which pipe a blast of air may be introduced into the furnace. vided with branches 9 leading through openings in the front wall of the pro-heating chamber 10 and communicates with the coils l1, and Which latter have nozzles 12 opening into the chamber 10 and through which coils air is introduced. The top wall of the chamber is provided with fiues 13, which communicate with the passageway 1%, which in turn communicates with the chamber 10. Flues 15 are formed in the front wall of the furnace, affording means for communication between the same and the chamber 10 near the forward lower portion thereof, as shown in Fig. 1 of the drawings.

The combustion of fuel within the fire chamber will be expedited by the blast of air introduced through the pipe 7 and the greater part of the in the fire chamber will pass over the bridge wall 16 into the working chamber 3. A separate blast will be supplied to the passageway 14: through the pipes 9 and coils in which it is pre-heated. The blast of air passing from the coils through the nozzles 12 into the chamber 10 will create a suction which will draw a certain percentage of the gas into the preheating chamber 10 through the ports 15 and which will heat the air therein about the coils 11, thus further preheating the air which passes through the said coils and before it makes exit into the chamber 10. As the air emerges from the nozzles 12 and commingles'with the gases in the chamber 10, the gas and air will be mixed in the latter and the passageway 1% and will make exit through the ports 13 into the working chamber 3. After the furnace is in operation, the coils 11 in the chamber 10 will become thoroughly heated by the gases in said chamber and in turn will pre-heat the air passing through the coils. The admission of this mixture of pre-heated air and gas through the ports 13 into the working chamber will produce a very high degree of heat, thus enabling the operator to obtain a much increased production over that which would be possible to obtain by the ordinary types of furnace. In addition to the main recuperation described, there is an auxiliary recuperation adjacent to the fiues of the furnace and through the medium of the pipe 18 having branches 19 leading through the rear wall 20 and which communicate with the coils 21 located in the chamber 22. The

Another pipe 8 is pro-- wall of the furnace is provided with flues 23 communicating between the working chamber and the chamber 22'. The blast of air entering through the pipe 18 into the coils 21 becomes heated before emerging from the nozzles 2% into the fines Said fines 25 communicate between the chamber 21 and the working chamber through the medium of the ports 26 in the side wall of the latter.

The operation of the auxiliary recuperator is similar to that of the main recupera tor, with the exception that the suction created. by the blast of air passing through the nozzles will draw a certain percentage of the gas through the working chamber through the ports 23. The air emerging from the nozzles 2-1: commingles with the gases coming from the chamber 22 and ,mixes in the tines 25 and makes exit into the working chamber 3 through the ports 26. With the use of the auxiliary recuperator, the operator may have perfect control of the heat in the furnace.

lVhat I claim to be new is:

A recuperator furnace having a grate therein, and a working chamber, a pre-heat- Gopies of this patent may be obtained for ing chamber with flues communicating between the same and the fire chamber, a passageway leading from the pie-heating cham- 30 ber and communicating with the fire chamber through flues in the roof thereof, coils mounted within said pro-heating chamber and having connection with an air supply pipe, nozzles connected to said coils and opening into the pro-heating chamber, and a blast pipe communicating with the fire chamber, an auxiliary recuperating chamber having ports communicating between the same and the working chamber, the walls of -1 the latter provided with passageways having ports leading therefrom into the working chamber, air-heating coils positioned Within said auxiliary recuperating chamber,

and having nozzles leading therefrom into WILLIAM 1-1. STUBBLEBINE.

Witnesses W. STUBBLEBINE,

M. A. TRANSUE.

five cents each, by addressing the Gommis'sioner' of Patents, Washington, D. 0. 

